#include <time.h>
#endif
+// Test if we correctly intercept gettimeofday and clock_gettime, and sleeps
-//Test if we correctly intercept gettimeofday and clock_gettime, and sleeps
-
-int main( int argc, char *argv[] )
+int main(int argc, char* argv[])
{
- MPI_Init( &argc, &argv );
+ MPI_Init(&argc, &argv);
- //gettimeofday - First test that two consecutive calls will return the same
- //time, as computing power is set to -1
+ // gettimeofday - First test that two consecutive calls will return the same
+ // time, as computing power is set to -1
- struct timeval tv1, tv2;
- gettimeofday (&tv1, NULL);
- gettimeofday (&tv2, NULL);
- if ((tv1.tv_sec != tv2.tv_sec) || (tv1.tv_usec != tv2.tv_usec))
- printf("Error, two consecutive calls to gettimeofday did not return same time (with cpu_threshold set to 0)\n");
+ struct timeval tv1;
+ struct timeval tv2;
+ gettimeofday(&tv1, NULL);
+ gettimeofday(&tv2, NULL);
+ if ((tv1.tv_sec != tv2.tv_sec) || (tv1.tv_usec != tv2.tv_usec))
+ printf("Error, two consecutive calls to gettimeofday did not return same time (with cpu_threshold set to 0)\n");
- //sleep one 1 second
- gettimeofday (&tv1, NULL);
- sleep(1);
- gettimeofday (&tv2, NULL);
- long res = ((tv2.tv_sec * 1000000 + tv2.tv_usec)) - ((tv1.tv_sec * 1000000 + tv1.tv_usec));
- if (res < 999998 || res > 1000002)
- printf("Error, sleep(1) did not exactly slept 1s\n");
+ // sleep one 1 second
+ gettimeofday(&tv1, NULL);
+ sleep(1);
+ gettimeofday(&tv2, NULL);
+ long res = ((tv2.tv_sec * 1000000 + tv2.tv_usec)) - ((tv1.tv_sec * 1000000 + tv1.tv_usec));
+ if (res < 999998 || res > 1000002)
+ printf("Error, sleep(1) did not exactly slept 1s\n");
- //usleep 100 us
- gettimeofday (&tv1, NULL);
- usleep(100);
- gettimeofday (&tv2, NULL);
- res = ((tv2.tv_sec * 1000000 + tv2.tv_usec)) - ((tv1.tv_sec * 1000000 + tv1.tv_usec));
- if (res <98 || res > 102)
- printf("Error, usleep did not really sleep 100us, but %ld\n", res);
+ // usleep 100 us
+ gettimeofday(&tv1, NULL);
+ usleep(100);
+ gettimeofday(&tv2, NULL);
+ res = ((tv2.tv_sec * 1000000 + tv2.tv_usec)) - ((tv1.tv_sec * 1000000 + tv1.tv_usec));
+ if (res < 98 || res > 102)
+ printf("Error, usleep did not really sleep 100us, but %ld\n", res);
- // clock_gettime, only if available
+ // clock_gettime, only if available
#if _POSIX_TIMERS > 0
- struct timespec tp1, tp2, tpsleep;
- clock_gettime (CLOCK_REALTIME, &tp1);
- clock_gettime (CLOCK_REALTIME, &tp2);
- if ((tp1.tv_sec != tp2.tv_sec) || (tp1.tv_nsec != tp2.tv_nsec))
- printf("Error, two consecutive calls to gettimeofday did not return same time (with running power to 0)\n");
-
- //nanosleep for 100ns
- clock_gettime (CLOCK_REALTIME, &tp1);
- tpsleep.tv_sec=0;
- tpsleep.tv_nsec=100;
- nanosleep(&tpsleep, NULL);
- clock_gettime (CLOCK_REALTIME, &tp2);
- res = ((tp2.tv_sec * 1000000000 + tp2.tv_nsec)) - ((tp1.tv_sec * 1000000000 + tp1.tv_nsec));
- if (res <98 || res > 102)
- printf("Error, nanosleep did not really sleep 100ns, but %ld\n", res);
+ struct timespec tp1;
+ struct timespec tp2;
+ struct timespec tpsleep;
+ clock_gettime(CLOCK_REALTIME, &tp1);
+ clock_gettime(CLOCK_REALTIME, &tp2);
+ if ((tp1.tv_sec != tp2.tv_sec) || (tp1.tv_nsec != tp2.tv_nsec))
+ printf("Error, two consecutive calls to gettimeofday did not return same time (with running power to 0)\n");
+ // nanosleep for 100ns
+ clock_gettime(CLOCK_REALTIME, &tp1);
+ tpsleep.tv_sec = 0;
+ tpsleep.tv_nsec = 100;
+ nanosleep(&tpsleep, NULL);
+ clock_gettime(CLOCK_REALTIME, &tp2);
+ res = ((tp2.tv_sec * 1000000000 + tp2.tv_nsec)) - ((tp1.tv_sec * 1000000000 + tp1.tv_nsec));
+ if (res < 98 || res > 102)
+ printf("Error, nanosleep did not really sleep 100ns, but %ld\n", res);
#endif
- MPI_Finalize();
- return 0;
+ MPI_Finalize();
+ return 0;
}
